Mini-ITX Mainboard Manual
14
JSEL3_1: Voltage Switch Header for JCOM1A (Pin1~6)
JSEL3_1: RS-232/422/485 Switch Header for JCOM1A (Pin7~12)
This header is for controlling the 9Pin of JCOM1A to switch 5V or 12V, and
determines that JCOM1A belongs to RS-232, 422, or 485.
1-2 -PRI
(Default)
3-4 +5V
5-6 +12V
7-8 RS-232
(Default)
9-10 RS-422
11-12 RS-485
JSEL4: Voltage Switch Header for JCOM1B *
This header is for controlling the 9Pin of JCOM1B to switch 5V or 12V.
3
1
Pin 1-2 Close:
+5V (Default)
1
3
3
1
Pin 2-3 Close:
+12V
